Finite Element Analysis Of The Frame Of 50KJ Hydraulic Die Forging Hammer

With the rapid development of modern industries, more and more high-precision and high-quality die forgings are needed. With the high productivity, dimensional stability and high utilization of materials, die forgings in particular the precision forgings, can reduce or avoid the cutting workload, help to improve the mechanical properties of materials, lower cost forgings.Hammer forging equipment ,with the advantages of fight faster , good forming process , simple structure and easy installation,and low cost, is the cheapest and omni- potent equipment for complete the forging process. It has played an important role in the forging industry,and it is the large-indispensable forging equipment in mechanical manufacturing. Compared to the steam-air hammer, hydraulic die forging hammer ,with the advantages of high efficiency, energy conservation, reduced vibration, improving the working environment, a simple power source, saving auxiliary equipment investment, elimination of environmental pollution, conservation of water resources and the realization of program control and electromechanical integration, is the development direction of the hammer equipment. Development and promotion of hydraulic die forging hammer will bring huge economic benefits and social benefits for the state and enterprises. With the development of modern science and technology, especially the universal application of computers, the Finite Element Analysis technology has got more and more attention and a wide range of applications in the engineering design and analysis, and it has been an effective method to solve problems of the complex engineering analysis. Use the FEA to analyze and calculate the strength and stiffness of large and medium-sized frames can accurately calculated the stress and deformation of the whole frame, also can reflect local stress and strain to identify the precise danger position of the frame, improve the accuracy of calculation, it is a more desirable and accurate method of calculation.Based on the study of the principle and the structure characteristics of hydraulic forging hammer, and the finite element analysis method,with the finite element analysis software ANSYS10.0 as analytical tools,this paper has done the finite element structural analysis for the frame of 50KJ hydraulic die forging hammer which is developed by the Roll Forging Research Institute of JilinUniversity,including the static analysis,modal analysis and transient analysis.Through this analysis , ditribution laws of the stress and displacement of the frame under static and dynamic loads can be obtained,and it provides reliable theoretical basis for the improve of the hydraulic forging hammer,has a certain theoretical and practical value.Its main contents are as follows:1. Study the work principle and the structure characteristics of the hydraulic die forging hammer and the ANSYS finite element analysis methods.2. Simplify the structure of the frame, establish the three-dimensional solid model of the frame with the 3D software UG, and then introduce the solid model into ANSYS to do the finite element analysis. The way of creating the solid model and finite element model has some reference value for similar structures of closed rack in the future.3. Do the static analysis for the frame ,obtain the distribution of the stress and displacement of the frame under the static loading,and understand the stress concentration position and weak links of the frame.4. Do the modal analysis for the frame, extract the top ten bands modal,obtained the natural frequency and the corresponding vibration mode of the first 10 bands non-rigid mode,and then do the detailed analysis and evaluation for each vibration mode.This has certain reference for for understanding the dynamic performance and optimized design of the hydraulic die forging hammer.5. Do the transient analysis for the frame .Through studying the response of the frame under a given dynamic load,to understand the pros and cons dynamic performance of the hydraulic die forging hammer.Then compare the static and dynamic analysis results.6. Finally, presents the conclusions and prospects of the issues.Through this study we may know:â’ˆThe dovetail slot, the corner of the two pillars and the upper and lower beam, and the track near the module block will have a greater stress, And the most serious stress concentration is on the site of the root of the dovetail slot.It is also the danger part of the whole frame and should be focused on in the design process.â’‰The greatest values of the Von Mises stress under static and dynamic loads are less than the yield stress the rack,which proved the frame of the 50KJ hydraulic die forging hammer meet the requirements of strength and In a state of security.â’ŠThis frame does not resonant and meets the design requirements on reducing noise pollution.The 50 KJ hydraulic die forging hammer studied by this paper has reasonable dynamic parameters, and consistents with the design requirements.â’‹This frame still has optimizing space, further optimize design of the structure can be done to make the structure be more perfected. This paper shows that the 3D finite element analysis for the hydraulic die forging hammer rack can obtain the static and dynamic parameters.This will have important significance for the understanding of the existing structure and to improve its performance, and provide a theoretical basisfor the overall design of the new hydraulic die forging hammer. At the same time we can know that , such large-scale structure as hydraulic forging hammer rack, the finite element analysis after the structure reasonably simplified can optimize the equipment structure better and faster and improve the design standards. The analysis method in this paper provides an effective analysis programme for the similar structure. Particularly,the solid model and finite element model established by this paper has certain reference value for the series hydraulic die forging hammer.